"Whats that "

A 85 Year Old Man was siting on bench in a garden with his 65 years Old Son. 

Father asked "Whats that " , Son replied "That's a Sparrow". 

Father again asked "Whats that " , Son replied "That's a Sparrow". 

Father asked again "Whats that " , Son replied with a bit loud voice "That's a Sparrow".
It hapens 2-3 times More.

Father asked again "Whats that ". Son started shouting on his father & said why are you irritating me asking same question .

Father get up & put a hand on head of his Son & said,
"When I i was young & you were 3 years old you was the same question["What's that ,when you saw the sparrow for first time"] 35 times & every time I answered gently "That's a Sparrow". "

Think do you behave like this in some way to your parents.

Story just get in my mind , heard long back